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https://issues.apache.org/jira/browse/KAFKA-7663?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16984797#comment-16984797
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Patrik Kleindl commented on KAFKA-7663:
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[~vvcephei] [~ableegoldman] See my comment above, I tried to get there during
another issue (deserialize on restore to catch malformed records) but the order
of initialization got in my way to call process() too.
And I think it would be worth to allow three strategies for the restore:
* restore only (current functionality)
* restore and deserialize (to catch malformed records in the source topic but
just put them 1:1 in the store)
* restore and process (including deserialization, to run everything through a
custom processor)
> Custom Processor supplied on addGlobalStore is not used when restoring state
> from topic
> ---------------------------------------------------------------------------------------
>
> Key: KAFKA-7663
> URL: https://issues.apache.org/jira/browse/KAFKA-7663
> Project: Kafka
> Issue Type: Improvement
> Components: streams
> Affects Versions: 1.0.0
> Reporter: Frederic Tardif
> Priority: Major
> Attachments: image-2018-11-20-11-42-14-697.png
>
>
> I have implemented a StreamBuilder#{{addGlobalStore}} supplying a custom
> processor responsible to transform a K,V record from the input stream into a
> V,K records. It works fine and my {{store.all()}} does print the correct
> persisted V,K records. However, if I clean the local store and restart the
> stream app, the global table is reloaded but without going through the
> processor supplied; instead, it calls {{GlobalStateManagerImp#restoreState}}
> which simply stores the input topic K,V records into rocksDB (hence bypassing
> the mapping function of my custom processor). I believe this must not be the
> expected result?
> This is a follow up on stackoverflow discussion around storing a K,V topic
> as a global table with some stateless transformations based on a "custom"
> processor added on the global store:
> [https://stackoverflow.com/questions/50993292/kafka-streams-shared-changelog-topic#comment93591818_50993729]
> If we address this issue, we should also apply
> `default.deserialization.exception.handler` during restore (cf. KAFKA-8037)
>
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